api: remove oldestCommit support

For codesite-migrated repositories, looking at the oldest commit is
preferable to determine the "create date". But for forked projects,
looking at the oldest commit is incorrect for when we started the project
If inferring the real create date has to be manual, then let's rely on
the Gitea metadata - it's faster and can be modified by hand if needed

api.go

@@ -19,7 +19,6 @@ type Repo struct {
 	GiteaCreated time.Time `json:"created_at"`
 	GiteaUpdated time.Time `json:"updated_at"`
 
-	oldestCommit time.Time
 	newestCommit time.Time
 	topics       []string
 }
@@ -46,16 +45,6 @@ func (this *Application) populateCommitInfo(ctx context.Context, rr *Repo) {
 		}
 	}
 
-	// The oldest commit needs us to page through the commit history to find it
-
-	oldestCommit, err := this.oldestCommit(ctx, rr.Name, "")
-	if err != nil {
-		log.Printf("finding oldest commit for '%s': %s", rr.Name, err)
-		rr.oldestCommit = rr.GiteaCreated // best guess
-
-	} else {
-		rr.oldestCommit = oldestCommit.Commit.Author.Date
-	}
 }
 
 type ContentsResponse struct {
@@ -189,17 +178,6 @@ func (this *Application) commits(ctx context.Context, repo, ref string) ([]Commi
 	return ret, nil
 }
 
-func (this *Application) oldestCommit(ctx context.Context, repo, ref string) (CommitListEntry, error) {
-	cc, err := this.commits(ctx, repo, ref)
-	if err != nil {
-		return CommitListEntry{}, err
-	}
-
-	// Take the last listed entry
-	// TODO maybe need to iterate/sort?
-	return cc[len(cc)-1], nil
-}
-
 // reposPage gets a single page of the list of Git repositories in this organisation.
 func (this *Application) reposPage(ctx context.Context, page, limit int) ([]Repo, error) {
 	var repos []Repo

pages.go

@@ -114,8 +114,8 @@ func (this *Application) Homepage(w http.ResponseWriter, r *http.Request) {
 			<tr
 				class="`+html.EscapeString(rowClass)+`"
 				data-sort-al="`+fmt.Sprintf("-%d", this.reposAlphabeticalOrder[repo.Name])+`"
-				data-sort-ls="`+fmt.Sprintf("%.0f", repo.newestCommit.Sub(repo.oldestCommit).Seconds())+`"
+				data-sort-ls="`+fmt.Sprintf("%.0f", repo.newestCommit.Sub(repo.GiteaCreated).Seconds())+`"
-				data-sort-ct="`+fmt.Sprintf("%d", repo.oldestCommit.Unix())+`"
+				data-sort-ct="`+fmt.Sprintf("%d", repo.GiteaCreated.Unix())+`"
 				data-sort-mt="`+fmt.Sprintf("%d", repo.newestCommit.Unix())+`"
 			>
 				<td>

sync.go

@@ -71,7 +71,7 @@ func (this *Application) sync(ctx context.Context) (bool, error) {
 
 	// But then make sure the final sort is by most-recently-created
 	sort.Slice(repos, func(i, j int) bool {
-		return repos[i].oldestCommit.After(repos[j].oldestCommit)
+		return repos[i].GiteaCreated.After(repos[j].GiteaCreated)
 	})
 
 	// Commit our changes for the other threads to look at